Finding the Fourth Proportional to 209,164.05, 288,648.18 and 113,670.72

Step by Step Solution

1. Step 1: Write the proportion equation
   209,164.05 : 288,648.18 = 113,670.72 : x
2. Step 2: Convert to fraction form
   209,164.05/288,648.18 = 113,670.72/x
3. Step 3: Cross multiply
   209,164.05x = 288,648.18 × 113,670.72
4. Step 4: Simplify right side
   209,164.05x = 32,810,846,447.29
5. Step 5: Solve for x
   x = 32,810,846,447.29/209,164.05
6. Step 6: Final answer
   x = 156,866.57